andrew.cooper3 at citrix
Aug 9, 2013, 3:43 AM
Post #2 of 4
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Re: [PATCH 5/7] Nested VMX: Check whether interrupt is blocked by TPR
[In reply to]
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On 09/08/13 09:49, Yang Zhang wrote:
> From: Yang Zhang <yang.z.zhang [at] Intel>
>
> If interrupt is blocked by L1's TPR, L2 should not see it and keep
> running. Adding the check before L2 to retrive interrupt.
>
> Signed-off-by: Yang Zhang <yang.z.zhang [at] Intel>
> ---
> xen/arch/x86/hvm/vmx/intr.c | 5 +++++
> 1 files changed, 5 insertions(+), 0 deletions(-)
>
> diff --git a/xen/arch/x86/hvm/vmx/intr.c b/xen/arch/x86/hvm/vmx/intr.c
> index cb120f2..8853939 100644
> --- a/xen/arch/x86/hvm/vmx/intr.c
> +++ b/xen/arch/x86/hvm/vmx/intr.c
> @@ -165,6 +165,11 @@ static int nvmx_intr_intercept(struct vcpu *v, struct hvm_intack intack)
> {
> u32 ctrl;
>
> + /* If blocked by L1's tpr, then do nothing*/
As you need to respin, please have a space at the end of the sentence
before */
> + if ( nestedhvm_vcpu_in_guestmode(v) &&
> + hvm_interrupt_blocked(v, intack) == hvm_intblk_tpr )
Alignment
~Andrew
> + return 1;
> +
> if ( nvmx_intr_blocked(v) != hvm_intblk_none )
> {
> enable_intr_window(v, intack);
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